Not tried this, but you could consider exposing a REST Service from your PRPC - that lets you upload an image. Then (for windows) try something like this Powershell script(https://gallery.technet.microsoft.com/scriptcenter/2b162a63-cf2b-46df-8ec2-45378599fac9) , modify the script to also include a 'Invoke-RestMethod' (https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/invoke-restmethod?view=powershell-6) ?

Yes and once the image is uploaded, you can use it as a binary file and present it in your screen, like UI gallery is doing with pxUIGalleryShoppingItem.